Ahmad J.

I help startups turn complex product ideas and unstable codebases into reliable React Native, SaaS, and AI-powered applications. I’m a UK-based senior developer with 20 years of experience building mobile apps, SaaS platforms, backend systems, and production web applications. React Native Development I build and maintain production mobile apps using React Native, Expo, Expo Router, TypeScript, JavaScript, Firebase, RevenueCat, push notifications, deep linking, REST APIs, real-time messaging, TestFlight, App Store Connect, Google Play Console, and EAS Build. I can help with new mobile app development, existing React Native codebases, performance improvements, third-party integrations, subscriptions, notifications, and iOS/Android releases. MERN & Full-Stack JavaScript For web and backend development, I work with MongoDB, Express.js, React, Node.js, Next.js, NestJS, TypeScript, PostgreSQL, Supabase, Redis, REST APIs, WebSockets, Stripe, AWS, Azure, and Docker. I build SaaS platforms, admin dashboards, APIs, multi-tenant systems, subscription products, marketplaces, real-time applications, and AI-enabled web platforms. .NET Backend Development I also work with .NET, ASP.NET Core, .NET Core, REST APIs, SQL Server, PostgreSQL, authentication, background services, third-party integrations, and cloud deployments on Azure and AWS. This is particularly useful for products where React or React Native applications need to integrate with an existing .NET backend or where a scalable API layer needs to be built or modernised. How I Can Help • React Native and Expo apps • MERN and full-stack JavaScript development • .NET / ASP.NET Core backend development • SaaS and multi-tenant platforms • Node.js and NestJS backend development • AI integrations, RAG, semantic search, and conversational workflows • Stripe, subscriptions, marketplace payments, and RevenueCat • API integrations, real-time features, and notifications • Existing codebase takeovers, debugging, and performance optimisation • Production deployment and mobile app releases I’ve worked across SaaS, FinTech, AI, Healthcare, EdTech, marketplaces, social platforms, Web3, fitness, recruitment, and enterprise software. If you’re building a mobile app, SaaS platform, or full-stack product, send me a message and we can discuss the best technical approach on a quick call.